Question

I read 3/5 of a book on one day and 4/5 of the remainder on another day. If now there were 27 pages unread, the book (approx) contains

a. 240

b. 340

c. 230

d. 140 correct

Answer 1

$\textbf{\huge{ANSWER:}}$

Let the total number of pages be = x

Pages read on 1st day = 3/5 of x

=》 $\textbf{3x/5}$ ..(1)

Remaining pages = x - 3x/5

=》 $\textbf{2x/5}$

4/5 of 2x/5 = $\textbf{8x/25}$ ..(2)

We still have 27 pages unread. Don't forget that!

Now, add (1) , (2), and 27 altogether.

As they are the number of pages, keep their sum equal to x.

Doing the same:

$\textbf{ 3x/5 + 8x/25 + 27 = x}$

=》$\textbf{8x + 15x + 675 = 25x}$ (Taken just the LCM)

=》$\textbf{ 23x + 675 = 25x}$

=》$\textbf{675 = 25x - 23x}$

=》$\textbf{675/2 = x}$

=》$\textbf{339.5 = x}$

Taking it approx, we get:

$\textbf{ 340 pages}$ (approx)

Therefore, (b) is the correct answer.

Hope it Helps!! :)

Answer 2

we have 340 pages ,,

well answer coming in approximately 339.5 ,, as we know that pages can't be in decimal , that's why taken as 340 .

hope it helps !!

solution told in attachment !!

All the best !!